This picture taken on August 12, 2013 shows Siberian tigers licking ice cubes to cool off in Guaipo Siberian Tiger Park in Shenyang, northeast China's Liaoning province. Temperatures have reached or exceeded 35 degrees Celsius for an average of 25.3 days in eight provinces and municipalities since July 1, marking the greatest number of hot days recorded during the period since 1961, National Meteorological Center (NMC) says on August 11.

This picture taken on August 12, 2013 shows Siberian tigers... Photo-5050549.16395 - GreenwichTime

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Orangutans eat fruits in the ice at the Seoul Zoo in Gwacheon, South Korea, Monday, Aug. 12, 2013. The zoo gave the special iced treat to the animals to help them overcome the hot summer weather.

Orangutans eat fruits in the ice at the Seoul Zoo in Gwacheon, South Korea, Monday, Aug. 12, 2013. The zoo gave the special iced treat to the animals to help them overcome the hot summer weather.

Photo: Ahn Young-joon, Associated Press

Orangutans eat fruits in the ice at the Seoul Zoo in Gwacheon,... Photo-5050445.16395 - GreenwichTime

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A Ring tailed lemur eats fruits in the ice at the Seoul Zoo in Gwacheon, South Korea, Monday, Aug. 12, 2013. The zoo gave the special iced treat to the animals to help them overcome the hot summer weather.

A Ring tailed lemur eats fruits in the ice at the Seoul Zoo in Gwacheon, South Korea, Monday, Aug. 12, 2013. The zoo gave the special iced treat to the animals to help them overcome the hot summer weather.

This picture taken on August 12, 2013 shows Siberian tigers licking ice cubes to cool off in Guaipo Siberian Tiger Park in Shenyang, northeast China's Liaoning province. Temperatures have reached or exceeded 35 degrees Celsius for an average of 25.3 days in eight provinces and municipalities since July 1, marking the greatest number of hot days recorded during the period since 1961, National Meteorological Center (NMC) says on August 11.

A seal shakes its head in the water at a zoo in Shanghai, China, Friday, July 26, 2013. Hot weather has set with temperatures rising up to 40 Celsius (104 Fahrenheit ) in Shanghai.

A seal shakes its head in the water at a zoo in Shanghai, China, Friday, July 26, 2013. Hot weather has set with temperatures rising up to 40 Celsius (104 Fahrenheit ) in Shanghai.

Photo: Eugene Hoshiko, Associated Press

A seal shakes its head in the water at a zoo in Shanghai, China,... Photo-5050430.16395 - GreenwichTime

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The eight-month-old male cub Nanuk has taken to wearing the plastic traffic cone as a hat to protect from the sun in his enclosure under the supervision of his mother female polar bear Cora and sister Kometa at Brno ZOO on July 24, 2013 in Brno, Czech Republic. Both cubs were born on November 2012. According to Czech forcasters last week was one of the driest weeks since 1951 and continuing sunshine with temperatures reaching above 40 degrees Celsius for another hot weekend has been reported.

The eight-month-old male cub Nanuk has taken to wearing the plastic traffic cone as a hat to protect from the sun in his enclosure under the supervision of his mother female polar bear Cora and sister Kometa at

The eight-month-old male cub Nanuk has taken to wearing the... Photo-5050573.16395 - GreenwichTime

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Polar bear twin cubs named Nanuk and Kometa play with a yellow ball under the supervision of their mother female polar bear Cora at Brno Zoo on July 24, 2013 in Brno, Czech Republic. Both cubs were born on November 2012. According to Czech forcasters last week was one of the driest weeks since 1951 and continuing sunshine with temperatures reaching above 40 degrees Celsius for another hot weekend has been reported.

Polar bear twin cubs named Nanuk and Kometa play with a yellow ball under the supervision of their mother female polar bear Cora at Brno Zoo on July 24, 2013 in Brno, Czech Republic. Both cubs were born on

Polar bear twin cubs named Nanuk and Kometa play with a yellow... Photo-5050570.16395 - GreenwichTime

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The eight-month-old male cub Nanuk has taken to wearing the plastic traffic cone as a hat to protect from the sun in his enclosure under the supervision of his mother female polar bear Cora and sister Kometa at Brno ZOO on July 24, 2013 in Brno, Czech Republic. Both cubs were born on November 2012. According to Czech forcasters last week was one of the driest weeks since 1951 and continuing sunshine with temperatures reaching above 40 degrees Celsius for another hot weekend has been reported. less

The eight-month-old male cub Nanuk has taken to wearing the plastic traffic cone as a hat to protect from the sun in his enclosure under the supervision of his mother female polar bear Cora and sister Kometa at ... more

Photo: Isifa, Getty Images

The eight-month-old male cub Nanuk has taken to wearing the plastic... Photo-5050640.16395 - GreenwichTime

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A Sumatran tiger refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A Sumatran tiger refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot

A polar bear refreshes with a giant strawberry syrup ice cube on 23 July 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A polar bear refreshes with a giant strawberry syrup ice cube on 23 July 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A brown bear refreshes with vegetables frozen in an ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A brown bear refreshes with vegetables frozen in an ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A Sumatran tiger refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A Sumatran tiger refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot

A white lion refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A white lion refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot

An elephant gets a shower, on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

An elephant gets a shower, on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

Photo: JEAN FRANCOIS MONIER, AFP / Getty Images

An elephant gets a shower, on July 23, 2013 at the La Fleche zoo,... Photo-5050554.16395 - GreenwichTime

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A white lioness refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot weather.

A white lioness refreshes with a giant chicken flavoured ice cube on July 23, 2013 at the La Fleche zoo, western France. Keepers at the zoo prepare cold treats for animals to give them respite from the hot

A squirrel monkey sits atop a mister to keep cool at the Phoenix Zoo, Friday, June 28, 2013 in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona. Dangerously hot temperatures are expected across the Arizona deserts throughout the week with a high of 118 Friday.

A squirrel monkey sits atop a mister to keep cool at the Phoenix Zoo, Friday, June 28, 2013 in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers

A squirrel monkey sits atop a mister to keep cool at the Phoenix... Photo-5050441.16395 - GreenwichTime

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Handler Cheryl Becker cools off an Indian Elephant, at the Phoenix Zoo, Friday, June 28, 2013 in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona. Dangerously hot temperatures are expected across the Arizona deserts throughout the week with a high of 118 Friday.

Handler Cheryl Becker cools off an Indian Elephant, at the Phoenix Zoo, Friday, June 28, 2013 in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure

Handler Cheryl Becker cools off an Indian Elephant, at the Phoenix... Photo-5050442.16395 - GreenwichTime

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Jai, a tiger at the Phoenix Zoo, breaks apart frozen trout while sitting in his pool to keep cool, Friday, June 28, 2013 in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona. Dangerously hot temperatures are expected across the Arizona deserts throughout the week with a high of 118 Friday.

Jai, a tiger at the Phoenix Zoo, breaks apart frozen trout while sitting in his pool to keep cool, Friday, June 28, 2013 in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as

A Hippopotamus enjoys a snack on a hot day at the zoo in Warsaw, Poland, Wednesday, June 19, 2013. The temperatures reached 30 degree Celsius, 86 degree Fahrenheit.

A Hippopotamus enjoys a snack on a hot day at the zoo in Warsaw, Poland, Wednesday, June 19, 2013. The temperatures reached 30 degree Celsius, 86 degree Fahrenheit.

Photo: Alik Keplicz, Associated Press

A Hippopotamus enjoys a snack on a hot day at the zoo in Warsaw,... Photo-5050429.16395 - GreenwichTime

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Male polar bear 'Sprinter' swims with a lump of frozen food consisting of fish, meat, and yoghurt in a pool in the zoo of Hanover, central Germany, on June 18, 2013. The animals are provided with the frozen food as a refreshment on a hot summer's day.

Male polar bear 'Sprinter' swims with a lump of frozen food consisting of fish, meat, and yoghurt in a pool in the zoo of Hanover, central Germany, on June 18, 2013. The animals are provided with the frozen

A pair of Zebra treat themselves with an iced carrot block (C) at the Taronga Zoo in Sydney on January 8, 2013. Keepers at the Taronga zoo prepared cold treats for animals to give them respite from the hot weather.

A pair of Zebra treat themselves with an iced carrot block (C) at the Taronga Zoo in Sydney on January 8, 2013. Keepers at the Taronga zoo prepared cold treats for animals to give them respite from the hot

Tiqui, a brazilian tapir is given a shower in its enclosure at the Taronga Zoo in Sydney on January 8, 2013. Keepers at the Taronga zoo prepared cold treats for animals to give them respite from the hot weather

Tiqui, a brazilian tapir is given a shower in its enclosure at the Taronga Zoo in Sydney on January 8, 2013. Keepers at the Taronga zoo prepared cold treats for animals to give them respite from the hot weather

Photo: AFP / Getty Images

Tiqui, a brazilian tapir is given a shower in its enclosure at the... Photo-5050540.16395 - GreenwichTime